Illinois Roofing Exam Study Guide
Complete Question Bank with Actual
Exam Questions, Verified Correct
Answers and Detailed Rationales
Illinois Roofing Exam Study Guide Complete Question |
Comprehensive Examination
Illinois Roofing Exam Study Guide Complete Question Bank
with Actual Exam Questions, Verified Correct Answers and
Detailed Rationales Latest Update 2026/2027 Already Graded
INTRODUCTION
This document is an important and very helpful preparation
resource for Illinois Roofing Exam Study Guide Complete
Question Bank with Actual Exam Questions, Verified Correct
Answers and Detailed Rationales Latest Update 2026/2027
Already Graded A+. Every item uses a focused exam stem, four
response options, a keyed response, and a clear rationale,
making it easier to understand the subject, spot distractors, and
build real exam confidence.
Page 1
, Question 1
Under the Illinois Roofing Industry Licensing Act (225 ILCS 335), which
scenario constitutes unlicensed roofing contracting?
A. A licensed roofer subcontracts installation of a commercial flat roof to
another licensed roofer.
B. A general contractor with no roofing license performs roof repairs
exceeding $1,000 on a residential property.
C. A homeowner replaces shingles on their primary residence without a
license.
D. A licensed roofer bids on a project in a municipality that requires an
additional local license.
Correct Answer: B - A general contractor with no roofing license
performs roof repairs exceeding $1,000 on a residential property.
RATIONALE
The Act requires a state roofing license for any roofing work over
$1,000, including repairs, unless performed by the homeowner on
their own residence. A general contractor without a roofing license
cannot perform or offer to perform roofing work; subcontracting to a
licensed roofer is permitted, and bidding in a local jurisdiction may
require additional local licensure but does not violate state law.
Question 2
A roofing contractor is installing a new asphalt shingle roof over an existing
layer of shingles. The existing roof has significant granule loss and curled
edges. According to the International Residential Code (IRC) and manufacturer
recommendations, what is the most appropriate action?
A. Install new shingles directly over the existing layer after sweeping the
surface.
B. Remove the existing shingles down to the deck, inspect and repair the
deck, then install new underlayment and shingles.
Page 2
, C. Apply a self-adhering underlayment over the old shingles, then install
new shingles.
D. Install a new layer of shingles only if the existing roof is less than 10
years old.
Correct Answer: B - Remove the existing shingles down to the
deck, inspect and repair the deck, then install new underlayment
and shingles.
RATIONALE
Most manufacturers and the IRC limit roof overlays to one layer of
shingles, but existing shingles with granule loss and curling indicate
deterioration that can compromise the new roof. Best practice and
code require tear-off to inspect the deck for damage, ensure proper
flashing, and allow for a new underlayment. Installing over
deteriorated shingles can void warranties and lead to premature
failure.
Question 3
When estimating labor for a steep-slope roofing project, which factor most
significantly increases labor hours compared to a low-slope project of equal
area?
A. Increased material weight per square.
B. The need for additional safety measures and slower movement on
steep pitches.
C. Higher cost of underlayment.
D. Greater number of fasteners required.
Correct Answer: B - The need for additional safety measures and
slower movement on steep pitches.
Page 3
, RATIONALE
Steep-slope roofs (typically 4:12 and above) require fall protection,
roof jacks, and careful footing, which slow production. While material
weight and fasteners may vary, the dominant labor factor is the
reduced speed and increased safety setup. Low-slope roofs allow
faster, more stable movement.
Question 4
A roofing crew is installing a modified bitumen membrane using a torch.
Which safety practice is critical to prevent fire hazards?
A. Have a fire extinguisher within 50 feet and a fire watch during and
after application.
B. Torch only during windy conditions to disperse fumes.
C. Store propane tanks on the roof near the work area for quick access.
D. Use a torch without a flame guard to increase efficiency.
Correct Answer: A - Have a fire extinguisher within 50 feet and a
fire watch during and after application.
RATIONALE
Torch-applied roofing requires a fire watch, proper extinguishers, and
adherence to NFPA and OSHA standards. Windy conditions can
spread flames, propane tanks should never be stored on the roof, and
flame guards are essential to prevent overheating. The correct answer
reflects standard fire safety protocols.
Question 5
In Illinois, a roofing contractor must provide a written contract for residential
roofing work. Which element is NOT required by the Illinois Roofing Industry
Licensing Act?
A. The contractor's license number.
B. A statement of the total cost.
C. A clause requiring binding arbitration for all disputes.
Page 4
Complete Question Bank with Actual
Exam Questions, Verified Correct
Answers and Detailed Rationales
Illinois Roofing Exam Study Guide Complete Question |
Comprehensive Examination
Illinois Roofing Exam Study Guide Complete Question Bank
with Actual Exam Questions, Verified Correct Answers and
Detailed Rationales Latest Update 2026/2027 Already Graded
INTRODUCTION
This document is an important and very helpful preparation
resource for Illinois Roofing Exam Study Guide Complete
Question Bank with Actual Exam Questions, Verified Correct
Answers and Detailed Rationales Latest Update 2026/2027
Already Graded A+. Every item uses a focused exam stem, four
response options, a keyed response, and a clear rationale,
making it easier to understand the subject, spot distractors, and
build real exam confidence.
Page 1
, Question 1
Under the Illinois Roofing Industry Licensing Act (225 ILCS 335), which
scenario constitutes unlicensed roofing contracting?
A. A licensed roofer subcontracts installation of a commercial flat roof to
another licensed roofer.
B. A general contractor with no roofing license performs roof repairs
exceeding $1,000 on a residential property.
C. A homeowner replaces shingles on their primary residence without a
license.
D. A licensed roofer bids on a project in a municipality that requires an
additional local license.
Correct Answer: B - A general contractor with no roofing license
performs roof repairs exceeding $1,000 on a residential property.
RATIONALE
The Act requires a state roofing license for any roofing work over
$1,000, including repairs, unless performed by the homeowner on
their own residence. A general contractor without a roofing license
cannot perform or offer to perform roofing work; subcontracting to a
licensed roofer is permitted, and bidding in a local jurisdiction may
require additional local licensure but does not violate state law.
Question 2
A roofing contractor is installing a new asphalt shingle roof over an existing
layer of shingles. The existing roof has significant granule loss and curled
edges. According to the International Residential Code (IRC) and manufacturer
recommendations, what is the most appropriate action?
A. Install new shingles directly over the existing layer after sweeping the
surface.
B. Remove the existing shingles down to the deck, inspect and repair the
deck, then install new underlayment and shingles.
Page 2
, C. Apply a self-adhering underlayment over the old shingles, then install
new shingles.
D. Install a new layer of shingles only if the existing roof is less than 10
years old.
Correct Answer: B - Remove the existing shingles down to the
deck, inspect and repair the deck, then install new underlayment
and shingles.
RATIONALE
Most manufacturers and the IRC limit roof overlays to one layer of
shingles, but existing shingles with granule loss and curling indicate
deterioration that can compromise the new roof. Best practice and
code require tear-off to inspect the deck for damage, ensure proper
flashing, and allow for a new underlayment. Installing over
deteriorated shingles can void warranties and lead to premature
failure.
Question 3
When estimating labor for a steep-slope roofing project, which factor most
significantly increases labor hours compared to a low-slope project of equal
area?
A. Increased material weight per square.
B. The need for additional safety measures and slower movement on
steep pitches.
C. Higher cost of underlayment.
D. Greater number of fasteners required.
Correct Answer: B - The need for additional safety measures and
slower movement on steep pitches.
Page 3
, RATIONALE
Steep-slope roofs (typically 4:12 and above) require fall protection,
roof jacks, and careful footing, which slow production. While material
weight and fasteners may vary, the dominant labor factor is the
reduced speed and increased safety setup. Low-slope roofs allow
faster, more stable movement.
Question 4
A roofing crew is installing a modified bitumen membrane using a torch.
Which safety practice is critical to prevent fire hazards?
A. Have a fire extinguisher within 50 feet and a fire watch during and
after application.
B. Torch only during windy conditions to disperse fumes.
C. Store propane tanks on the roof near the work area for quick access.
D. Use a torch without a flame guard to increase efficiency.
Correct Answer: A - Have a fire extinguisher within 50 feet and a
fire watch during and after application.
RATIONALE
Torch-applied roofing requires a fire watch, proper extinguishers, and
adherence to NFPA and OSHA standards. Windy conditions can
spread flames, propane tanks should never be stored on the roof, and
flame guards are essential to prevent overheating. The correct answer
reflects standard fire safety protocols.
Question 5
In Illinois, a roofing contractor must provide a written contract for residential
roofing work. Which element is NOT required by the Illinois Roofing Industry
Licensing Act?
A. The contractor's license number.
B. A statement of the total cost.
C. A clause requiring binding arbitration for all disputes.
Page 4
